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(11)

EP 3 188 851 A1

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(43) Date of publication: 12.07.2017 Bulletin 2017/28 (21) Application number: 15778026.3 (22) Date of filing: 04.09.2015

(51) International Patent Classification (IPC):  B09C 1/02(2006.01) B09C 1/08(2006.01) C02F 3/00(2006.01) C02F 3/34(2006.01) B09C 1/10(2006.01) A62D 3/02(2007.01) C02F 1/00(2006.01) (86) International application number: PCT/IB2015/056760 (87) International publication number: WO 2016/035045 (10.03.2016 Gazette 2016/10)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 04.09.2014 ZA 201406507 (71) Applicant: University Of The Free State 9301 Bloemfontein (ZA)	(72) Inventors: VAN HEERDEN, Esta 9301 Bloemfontein (ZA) CASTILLO, Julio Hernandez 9301 Bloemfontein (ZA) GOMEZ, Alba 9301 Bloemfontein (ZA) POSTHUMUS, Rohan 9301 Bloemfontein (ZA) VAN DER HOVEN, Walter George 9301 Bloemfontein (ZA) (74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB  Speditionstraße 21 40221 Düsseldorf 40221 Düsseldorf (DE)